647304913 has 2 divisors, whose sum is σ = 647304914. Its totient is φ = 647304912.

The previous prime is 647304887. The next prime is 647304923. The reversal of 647304913 is 319403746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385415424 + 261889489 = 19632^2 + 16183^2 .

It is a cyclic number.

It is not a de Polignac number, because 647304913 - 2¹³ = 647296721 is a prime.

It is not a weakly prime, because it can be changed into another prime (647304923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323652456 + 323652457.

It is an arithmetic number, because the mean of its divisors is an integer number (323652457).

Almost surely, 2^647304913 is an apocalyptic number.

It is an amenable number.

647304913 is a deficient number, since it is larger than the sum of its proper divisors (1).

647304913 is an equidigital number, since it uses as much as digits as its factorization.

647304913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 647304913 is about 25442.1876614414. The cubic root of 647304913 is about 865.0402213246.

The spelling of 647304913 in words is "six hundred forty-seven million, three hundred four thousand, nine hundred thirteen".